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Re: Is it possible to reverse "Color Schames" function ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg92967] Re: Is it possible to reverse "Color Schames" function ?
  • From: Jon McLoone <jonm at wolfram.co.uk>
  • Date: Tue, 21 Oct 2008 06:23:52 -0400 (EDT)
  • References: <gdja3r$idc$1@smc.vnet.net>

On Oct 21, 2:09 am, p.stu... at gmail.com wrote:
> Hello,
>
> I'm a student from Univerity of applied sciences Western Switzerland.
>
> I would like to know,  if it's possible to reverse the Color Schemes
> ( "Gradients").
>
> Exemple:  with "GrayTones"  from white to grey instead  grey to whi=
te.
>
> Thanks for your support.
>
> Best regards from Switzerland.

In the usual usage such as
ContourPlot[x y, {x, 0, 1}, {y, 0, 1}, ColorFunction -> "GrayTones"]

This is a compact notation for the more explicit ColorData function
ColorData["GrayTones"][x] where 0<x<1.
I, in this example...

ContourPlot[x y, {x, 0, 1}, {y, 0, 1},
 ColorFunction -> (ColorData["GrayTones"][#] &)]

You can reverse that with
ContourPlot[x y, {x, 0, 1}, {y, 0, 1},
 ColorFunction -> (ColorData["GrayTones"][1-#] &)]


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